Power tool battery pack



FIG. 1 is a perspective view of a power tool battery pack, showing our new design;

FIG. 2 is a perspective view viewed from another angle thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a right side elevation view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines in the figures are for the purpose of illustrating portions of the power tool battery pack that form no part of the claimed design. 

CLAIM The ornamental design for a power tool battery pack, as shown and described. 